Explain how the colour of a solution of `K_2Cr_2O_7` depends on the pH of the solution ?

What is the action of heat on K_2Cr_2O_7 and KMnO_4 ?

When H_2O_2 is shaken with an acidified solution of K_2Cr_2O_7 in presence of ether, the ethereal layer turns blue due to the formation of

How is K_2Cr_2O_7 prepared ? Write chemical equations.

Write the reaction of SO_2 with K_2 Cr_2 O_7

Colour of acidic K_2Cr_2O_7 solution is orange / yellow .

What is the colour of pH paper in NaCl solution?

Calculate the pH of the solution containing 2g of NaOH per liter of the solution.